Lighting device



FIG. 1 is a front perspective view of a lighting device, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing is superimposed on the continuous surface of the claimed design, is for illustrative purposes only, and forms no part of the claimed design. 

We claim the ornamental design for a lighting device, as shown and described. 